<template>
  <el-container class="home-container">
    <!-- 头部区域 -->
    <el-header>
      <div>
        <img src="../assets/heima.png" alt="" />
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <!-- 页面主题区域 -->
    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="isCollapse ? '64px' : '200px'">
        <!-- 折叠菜单栏按钮 -->
        <div class="toggle-button" @click="toggleCollapse">|||</div>
        <el-menu
          background-color="#333744"
          text-color="#fff"
          active-text-color="#409EFF"
          unique-opened
          router
          :collapse="isCollapse"
          :collapse-transition="false"
          :default-active="activepath"
        >
          <!-- 一级菜单 -->
          <el-submenu
            :index="item.id + ''"
            v-for="item in menuList"
            :key="item.id"
          >
            <!-- 一级菜单模板区域 -->
            <template slot="title">
              <!-- 图标 -->
              <i :class="iconsObj[item.id]"></i>
              <!-- 文本 -->
              <span>{{ item.authName }}</span>
            </template>
            <!-- 二级菜单 -->
            <el-menu-item
              :index="'/' + subItem.path"
              v-for="subItem in item.children"
              :key="subItem.id"
              @click="saveNavState('/' + subItem.path)"
            >
              <!-- 图标 -->
              <i class="el-icon-menu"></i>
              <!-- 文本 -->
              <span>{{ subItem.authName }}</span></el-menu-item
            >
          </el-submenu>
        </el-menu>
      </el-aside>
      <!-- 主分区 -->
      <el-main><router-view></router-view></el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  name: 'Home',
  data() {
    return {
      menuList: [],
      iconsObj: {
        125: 'iconfont icon-user',
        103: 'iconfont icon-tijikongjian',
        101: 'iconfont icon-shangpin',
        102: 'iconfont icon-danju',
        145: 'iconfont icon-baobiao',
      },
      isCollapse: false,
      activepath: '',
    }
  },
  created() {
    this.getMunuList()
    this.activepath = sessionStorage.getItem('activepath')
  },
  methods: {
    logout() {
      sessionStorage.clear()
      this.$router.push('/login')
    },
    async getMunuList() {
      const { data: res } = await this.$http.get('menus')
      if (res.meta.status !== 200) return this.$$message.error(res.meta.msg)
      this.menuList = res.data
    },
    //点击按钮控制菜单展开和折叠
    toggleCollapse() {
      this.isCollapse = !this.isCollapse
    },
    saveNavState(activepath) {
      sessionStorage.setItem('activepath', activepath)
      this.activepath = activepath
    },
  },
}
</script>

<style lang="less" scoped>
.home-container {
  height: 100%;
  .toggle-button {
    background: #4a5064;
    font-size: 10px;
    color: #fff;
    text-align: center;
    letter-spacing: 0.2em;
    cursor: pointer;
  }
  .el-header {
    background-color: #373d41;
    display: flex;
    justify-content: space-between;
    padding: 0;
    align-items: center;
    color: #fff;
    font-size: 20px;
    & > div {
      display: flex;
      align-items: center;
      span {
        margin-left: 15px;
      }
    }
  }
  .el-aside {
    background-color: #333744;
    transition: width 0.3s linear;

    .el-menu {
      // 菜单对齐
      border-right: none;
    }
  }
  .el-main {
    background-color: #eaedf1;
  }
  .iconfont {
    margin-right: 10px;
  }
}
</style>